Iwagumi

noun2

1. •
   A Japanese style of aquarium aquascaping that focuses on the simplistic yet harmonious placement of stones; (countable) an aquascape in this style.

   • Inspired by Japanese nature and its simple yet rich culture, Iwagumi style aquascape is becoming a trendy design in themed aquariums today, which translates to “rock garden.” — 2019
2. •
   (rare) A similar style of stone placement but for gardens.

   • In arranging rocks as iwagumi rocks are generally placed in three ways: standing vertically, lying horizontally on top of the ground, and half buried in the ground. — 1970